Before buying the Iveco I am currently converting I did look at some EV Vans, the Maxus EV80 was relatively cheap and cheerful several people have already converted those, ideal for very short range day and overnight trips.
At the time the Amazon etc Sprinter rejects were still too expensive ditto the Transit which was the most expensive but had the best range and features.
What I really wanted was a hybrid, there’s a few out now afaik but at the time the only thing secondhand on the market was the transit Custom Phev, which is a very small van, with a 1000cc engine whinining away with no correlation to road speed as it works as a generator and a 14kw
battery range was around 30 miles on pure electric and then it was back to using petrol.
I test drove one and found the disconnected engine note made it quite a weird experience.
I think hybrids are the more sensible route for load lugging vehicles but the catch is the maintenance and eventually complex repairs once in the secondhand market could be very expensive.